Why doesn't Flo Rida credit his female vocalists?

Is Flo Rida/his publicity crew ignorant or misogynist? on his past two big hits (In the Ayer and Right Round), he has had prominent featuring vocals by two young female vocalists who sounded eerily similar to Fergie, and Katy Perry, respectively. These two oversights have caused major controversy over who is singing on the track. With all this controversy, why doesn't Flo just do the right thing and credit them, avoiding dispute and giving these women the chance to further their careers?